Inventor
CHANG YI-CHIH
TW13 patents
⚠️ This page may combine multiple inventors who share the name “CHANG YI-CHIH”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
WALTOP INT CORP
10 patentsUS9626011B2Apr 18, 2017
Rechargeable capacitive stylus
WALTOP INT CORP13 citations82
US9703401B2Jul 11, 2017
Portable electronic device and miniaturization rechargeable capacitive stylus thereof
WALTOP INT CORP2 citations71
US10564737B2Feb 18, 2020
Capacitive stylus with eraser
WALTOP INT CORP1 citations61
US10429956B2Oct 1, 2019
Capacitive stylus with detachable eraser
WALTOP INT CORP0 citations51
US10042444B2Aug 7, 2018
Capacitive stylus with two transmit electrodes
WALTOP INT CORP1 citations51
US10895930B2Jan 19, 2021
Message erasing device and message erasing system
WALTOP INT CORP0 citations47
US11023057B2Jun 1, 2021
Stylus structure having a barrier unit for contacting with a trigger component
WALTOP INT CORP0 citations42
US10613647B2Apr 7, 2020
Portable electronic device and stylus thereof
WALTOP INT CORP0 citations39
US10599272B2Mar 24, 2020
Portable electronic device and active capacitive stylus thereof
WALTOP INT CORP0 citations39
US9606642B2Mar 28, 2017
Portable electronic device and miniaturization rechargeable capacitive stylus thereof
WALTOP INT CORP0 citations39